/* 设置全局字体和背景颜色 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
}

/* 语言选择下拉列表样式 */
#lang-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-size: 16px;
    z-index: 10;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#lang-selector:hover {
    background-color: #0056b3;
}

/* 标题样式 */
h1 {
    text-align: center;
    color: #333;
    margin-top: 80px;
    font-size: 48px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

/* 内容容器样式 */
#div-content {
    background-color: #fff;
    width: 80%;
    max-width: 800px;
    margin: 30px auto;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

/* 列表样式 */
#div-content ul {
    list-style-type: none;
    padding: 0;
}

#div-content li {
    margin-bottom: 20px;
    border-radius: 10px;
    padding: 15px;
    transition: background-color 0.3s ease;
    background-color: #f0f8ff;
}

#div-content li:nth-child(odd) {
    background-color: #e9f7ef;
}

#div-content li:nth-child(even) {
    background-color: #f9f9f9;
}

#div-content li:hover {
    background-color: #c2e7d3;
}

/* 链接样式 */
#div-content a {
    color: #007BFF;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 18px;
}

#div-content a:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* 社交账号部分样式 */
#social-links {
    text-align: center;
    margin-top: 30px;
}

#social-links p {
    font-size: 20px;
    margin-bottom: 15px;
}

#social-links a {
    display: inline-block;
    margin: 0 15px;
    color: #007BFF;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 18px;
}

#social-links a:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 600px) {
    h1 {
        font-size: 32px;
    }

    #div-content {
        width: 90%;
        padding: 20px;
    }

    #lang-selector {
        top: 10px;
        right: 10px;
        padding: 10px 15px;
        font-size: 14px;
    }
}